Do you have any writing I can read about your classification? This sounds extremely interesting and useful. (I have some related thoughts, but not 20 years' worth and largely not recorded.)
Hmm. Perhaps I should get my notes into shape and publish them… I'll think about it. I would need to force myself to post them to HN without looking at the discussion, though.
Reminds me of Orthogonal Defect Classification. Analyze defects for when they were introduced (during development, architectural design and so on) and what caused the introduction of the defect into the system in the first place.
